From an email from Chris Watson (November 1998):
"Edinburgh Festival: We prepared a tape and a flysheet handout - and I think, a film which Richard would have produced. I am not certain if the film was for that project or not. We did not perform live at that festival. It was produced in the best Dadaist fashion and was played twice we were told, and then removed from the venue. As to the date - the festival is around Aug. I think it was 1975."

(Thanks to Dave Minshall from http://www.brainwashed.com/axis for this information) There is also some information in the book "The Art of the Sixth Sense" regarding the festival, in this case from Richard H. Kirk's and Stephen Mallinder's perspective